problem

Since Google Chrome was upgraded to chrome94 After version , The following error will appear when requesting the local interface under the non secure website ： Access to XMLHttpRequest at 'http://127.0.0.1:10005/' from origin 'http://testing.hongyangcloud.com' has been blocked by CORS policy: The request client is not a secure context and the resource is in more-private address space local.

screening

When requested 127.0.0.1 The server of is added with a response header that allows cross domain access Access-Control-Allow-Origin:*, And on the intranet IP There is no problem to visit the website , That is not caused by the browser's homology policy . Checked the ,chrome94 Start disabling private network requests from non secure websites .

Chrome Major renewal , Will limit localhost visit

Chrome Planning to disable private network requests from non secure websites , The purpose is to protect users from Cross Site Request Forgery for routers and other devices on the private network (CSRF ) attack ：

  • from Chrome 94 Start blocking private network requests from insecure public websites .
  • stay Chrome 101 Abandonment test completed in .
  • stay Chrome 92 Introduce some Chrome Strategy , Allow managed Chrome Deploy permanent bypass deprecation .

This is a chrome Update log of ：https://developer.chrome.com/blog/private-network-access-update/

What is a non secure website ？

stay Chrome Browser , When accessing, you will be prompted that the connection is unsafe , When a user clicks on any form on a web page to enter information , The browser address bar is gray “ unsafe ” Immediately red highlights “ unsafe ”.

Personal understanding , There is no trusted deployment CA The signature is valid TLS Certificate website

What is a private network ？

In the address architecture of the Internet , Private network refers to compliance with RFC 1918（IPV4） and RFC 4193（IPV6） standard , Special for use IP Address space network . private IP Unable to connect directly to the Internet , Need to use network address translation （ Network Address Translator,NAT ） Or a proxy server （ proxy server ） To achieve .

commonly , The LAN we built in the enterprise 、 LAN in home network 、 Your local localhost , All belong to the private network .

Private network access specification

Private network access specification （ Formerly known as CORS-RFC1918） This limits the ability of a web site to send requests to servers on a private network . It is only allowed from the security context （ HTTPS ） Such requests for . The specification also extends cross domain resource sharing ( CORS ) agreement , Therefore, the website must be authorized by the server on the private network to send requests .

The private network request is the of its target server IP The address is greater than that of the originator of the request IP Requests for more private addresses . for example , From public websites ( https://example.com ) Go to a private website ( http://router.local ) Request , Or from a private website to localhost Request .

The following tests access in several environments ：

We are in the process of development , These situations are actually quite common , Therefore, developers need to try and respond in advance .

visit localhost

If your website needs to ask localhost Request , Then you can refer to the following schemes ：

Mask client settings

Chrome There is a configuration to disable this function , stay Chrome Address field input “chrome://flags/” After entering the page , Search for “Block insecure private network requests”, Set to Disabled, Again Relaunch Just fine ：

Please note that ：chrome The setting for shielding insecure private network requests is from 94 Version to 101 Version is valid ,Chrome 101 Discard the test that ends in ; It will still be disabled , At present, we will solve the problem in a new way .

Website upgrade HTTPS

Just upgrade your site to HTTPS . Mixing content does not prevent you from http://localhost （ or http://127...*、http://[::1] ） The request for the target , Even from a security context .

Please note that , There's a pit here , WebKit Engine and browser based on it （ such as Safari ） It doesn't follow W3C Mixed content specification , The above requests will be treated as mixed content and access is prohibited . They also do not implement private network access , Therefore, if the website uses the client of this kind of browser , Need to try HTTP agreement , This type of browser still allows you to send messages to localhost Request .

Access private IP

If your website needs to be private IP The target server at the address makes a request , Simply upgrade the sponsor's website to HTTPS It doesn't work . Mixed content prevents the security context from passing through plaintext HTTP Request , Therefore, newly secured websites will still find themselves unable to make requests . There are several ways to solve this problem ：

Upgrade both ends to HTTPS

This plan is a little difficult , because HTTPS Only for public domain names , You need to give your private IP Register a public domain name , Then configure DNS Resolution points the public domain name to the private domain name IP, Finally, configure the domain name TLS certificate .

Reference material https://www.sohu.com/a/488979313_121124364

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